Walkthrough tips, Discussion of Campaigns [Heroes 5]

Thank you, but I'm interested in the issue where you complete half of the map (mission), and then unnecessary skills appear frequently (like "travel by sea" for Isabel), while the level still increases. And also, Boris K - are you playing Heroes on version 3.0? Where can I download it, because I thought it was only for Tribes of the East? P.S. Right now, I'm replaying Heroes from the beginning, and "Phantom" dropped in the hut, but I don't have the "Summon" skill. Can I "explore (fight)" the map and wait until "Summon" drops?